Hi, I have a graph in which two separate AudioFilePlayer AUs are feediing
into a Mixer unit that then outputs to Output unit. It works fine.

Then I set up a render callback on the Mixer unit, but it never gets called.

    AURenderCallbackStruct input;

    input.inputProc = SineWaveRenderProc;

    input.inputProcRefCon = &mixerCallback;

    CheckError(AudioUnitSetProperty(mixerUnit,

                                    kAudioUnitProperty_SetRenderCallback,

                                    kAudioUnitScope_Output,

                                    0,

                                    &input,

                                    sizeof(input)),

               "AudioUnitSetProperty failed");

Is this expected behaviour? The mixer is receiving samples on both inputs.
Is there a way to switch where the unit is pulling data from, ie. inputs or
RenderCallback?

-- 

Marcin
http://google.com/+MarcinRakowskiConnect
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